In 1989, Terry and Ted Rider founded Developmental Industries, Inc. The company quickly grew and is recognized today as one of the leading manufacturing facilities in Northeast Mississippi. Supporting many local businesses and producing the patended Roof Seamer, "DI" is the largest dedicated roof seamer manufacturer in the world. Over the years, automobile collecting and restoration has been a passion of both brothers and is recognized by this website. Many Shelby vehicles and other rare and fine automobiles are represented in thier collection.